Check the listing for details. Sentex Systems Infinity M Telephone Entry Access Control Panel. Condition: Used. Listed at 1275.00 USD. Sentex Systems Infinity M Telephone Entry Access Control Panel Ships via UPS Ground > Pulled from working condo building. > New Display The Sentex Infinity M is engineered for exceptional performance and functionality, combining the convenience of telephone entry with the flexibility of access control. Engineered for exceptional performances and functionality, the Infinity Series combines the convenience of telephone entry with the flexibility of access control. This powerful combination is designed with an extensive feature set and expandability to meet today's needs and tomorrow's growth. Each control panel can support card and code access for 2 doors or gates. In addition, the Infinity has the ability to network up to 16 panels for larger installation requirements.